Box machine



March 23, 1937- E, RlDER r AL 2,074,561

BOX MACHINE Filed Oct. 16, 1935 6 Sheets-Sheet l March 23, 1937. E. G. RIDER El AL 2,074,561

BOX MACHINE 6 Sheets-Sheet 2 Filed Oct. 16, 1935 INVENTORSYI ATTORNEY.

March 23, 1937. E, RIDER U A. 2,074,561

BOX MACHINE Filed Oct. 16, 1955 6 Sheets-Sheet 5 INVENTORS ham. M .4 BY Fi m 4 M 1. (2w

ATTORNEY.

March 23, l 937.

E. G. FHDER ET AL BOX MACHINE 6 Sheets-Sheet 4 Filed Oct. 16, 1935 INVENTORS BY yam M Mi 6915M ATTORNEY.

March 23, 1937. RlDER ET AL 2,074,561

BOX MACHINE Filed Oct. 16, 1955 6 Sheets-Sheet 5 INVENTORS BY M M MDLQM ATTORNEY.

Patented Mar. 23, 1937 BOX MACHINE Ernest G. Rider and Walter T. Bailey, Ihiladelphia, Par, assignors to Stokes and Smith Com-' pany, Summerdale, Pa., a corporation of Pennsyivania- Application October 16, 1935, Serial No, 45,247

8 Claims.

Our invention relates to apparatus for covering previously formed or stayed boxes, containers, or the like, by applying thereto a wrapper, label, or equivalent, or for forming a box from a single or multipiece box blank by applying sheet material, as a tabbed or untabbed wrapper, or tabs solely, previously partially applied or adherent to the box blank, to hold the box elements in box-forming position, and particularly to box mam chines of the type having a reciprocating form block which carries the box structure through various sheet-applying and/or staying stages.

In accordance with our invention, the operating mechanism for the form block structure is constructed either to complete thev movement of the form block from and back to its box-receiving position in substantially less than the cycle of the machine or to move slowly toward the sheetapplying or wrapping tools, to provide a substantial period during which a box structure and adhering sheet material may be placed upon the fo m block. and the mechanism for effecting the various box-wrapping or forming operations while the form block is away from the box-receiving position includes tools, more specifically corner-lap tools, whose operation does not require interruption of the movement of the form block.

Our invention further resides in the features of construction, combination and arrangement hereinafter described and claimed.

This application is a continuation-in-part of our copending application Serial No. 17,018, filed April 18, 1935.

For an understanding oi our invention and for illustration of preferred forms thereof, reference is to be had to the accompanying drawings in which:

Figure 1 is a front elevational view, with parts omitted and parts in section, of a box wrapping machine;

Fig. 2 is a side elevational view, with parts omitted and parts in'section, of Fig. 1;

Fig. 3 is a plan view of parts appearing in Fig. 2;

Fig. 4 is a side elevational view, on enlarged scale and with parts in section, of one of the tool slides of Fig. 1;

Fig. 4a is a detail view showing mechanism of Fig. 4 in a different operating position;

Fig. 5 is a detail view of a modified form of wrapping tool;

Fig. 6 isa plan view of Fig. 5;

Fig. 'l is a plan'view of Fig. 4 with parts in section and parts omitted;

Fig. 8 is a detail view showing a modified form of folding mechanism;

Fig. 9 is a plan view of Fig. 8;

Fig. 10 illustrates the parts of Fig. 8 in different operating positions;

Fig. 11 is a side elevational view with parts in section of another type of tool slide;

Figs. 12 and 13 illustrate the relations between the movements of the form block and the movements of the various wrapping tools throughout the cycles of different modifications.

The wrapping machine shown in Figs. 1 and 2 is, in general, similar to that shown in Smith Patent No. 691,329. The form block F for carry ing a box and wrapping assembly into operative relation with respect to various wrapping tools is operated by the main cam l secured to the upper end of shaft 2 which is driven from any suitable source of power connected to the shaft 2 through pulley 4, clutch 3 and shaft, 5.

As the form block moves downwardly, the box blank and wrapper are clamped against the lower form-block or platen P biased by a spring, not shown, to the position shown in Fig. 1. For continued downward movement of the form block, the rolls 6, 6a wipe the side panels of the. wrapper into engagement with the side walls of the box. As indicated by Fig. 2 the action of the rolls may be supplemented by the brushes 1, la. As the form block continues its downward movement, the corner-lap tools 8, to fold the flaps at the ends of the side panels of the wrapper around the corners of the box into engagement with the box ends; subsequently, the rolls 9, 9a, Fig. 1, wipe the end panels of the wrapper into engagement with the end walls of the box and the turned-in flap of the wrapper side panels. The form block continues its movement until the upper part UF thereof is slightly above the marginal turn-in tools Ill, Illa, "lb and I00, for example, approximately one-half inch. The upper part UF of the block is then stopped under the control of the cam groove II of cam i while the middle part IMF continues downward until the upper edge of the box is slightly below the tumin tools, whereupon the groove ii of cam l temporarily stops movement of the box. The turn-in tools ll-llc then move to turn in the marginal portions of the wrapper extending above the edge of the box and substantially concurrently the tools il-lic move inwardly lightly to press the sides of the box against the form block. The upper portion UF of the form block is then released and when the tools iii-4 0c PATENT orr cs f;

are withdrawn, the upper portion of the form blocks falls to fold the marginal portions of the wrapper into c s ment with the inside of the box. The pressing tools ll-lscare then again I achiatedmoreheavilytopressthesideaoithe box against the sides of the form block to insureagoodbondbetweentheboxandthe marginal turned-in portions of the wrapper.

The various tools are then withdrawn and the plunger moves upwardly toward its original poaition. As the form block leaves the platen P. the strippers BB controlled by cam groove ii of the main cam I remain stationary to prevent the completed box from following the form block to its box-receiving position. When the form block has moved out of the box, the strippers 83 are rapidly lifted clear of the box and thereupon the ejector J is automatically fired. forcibly to remove the completed box from the machine. so Heretofore. in machines of this type, exemplified by the aforesaid Smith patent, the cam I did not effect return of the form block to its boxreceiving position until nearly the end of the cycle of the machine, leaving a dwell of not more than about 30' which, unless the machine were run slowly. did not afford time enough for an operatorto place another box thereon. Moreover. with the prior machines, much less than all time todwell was available at box-feeding time since the did not clear the box until about 845'. and the ejectordid not fire until after about 350. With the machine operating at alow speed corresponding to about 20 boxes per minute, the operator had therefore only about 0.1 35 second during which the form block was accessible to receives box. It was not feasible to operate the machine at speeds higher than about twenty cycles per minute because the operator did not then have sufficient time to place a box on the form block.

with our improvements hereinafter described.

the wrapping operations are performed in a smaller fraction of the cycle, permitting, in accordance with a preferred form of the invention. 45 (Fig. 12). the form block to be returned to its original box-receiving position in time to afford during the cycle of the machine a dwell substantially greater than 30 and practically all of which is available for box-feeding. Specifically, 50 as hereinafter appears, the preferred construction affords a dwell of the form block of about 65; during about 40' of this dwell, the form block is accessible to receive a box. With the machine operating at a high speed, corresponding, for ex 55 ample, to about 30 boxes per minute, the operator therefore has about 0.4 second during which the form block is accessible to receive a box. A minimum feeding time of about 0.1 second may be obtained. at such higher speed, with a shorter dwell. but it is desirable that a longer box-feeding period be provided to compensate for the increased burden upon the operator of feeding a substantially increased number of boxes. Consequently. the operator, when our improved machine is running. for example, at a speed corresponding to 30 boxes per minute, has, in each cycle, a period, for placing a box on the form block, which is several times as long as the period available for that purpose with a machine 70 of the prior type operating at a low speed of only an boxes p'er minute.

As appears from Figs. 1 and 2, the various wrapping tools are carried by the four slides E, El, 88 and ESL which are adiustabiy se- 1 cured to the under side of the table l4 of the wrapplm machine. Specifically. the slides are reoeived by groove in the underside of the table and are supported by the gibs I. Fig. i. For different sises of boxes, different sizes of form blocks and platens are used; and to accommo- 5 date the machine for wrapping dificrent sizes of boxu. the slides are adiustable toward and from the path of the form block.

The internal construction and operating mechanism for the side slide 88 is shown in Fig. 4. The construction of the opposite slide 88f is identical and is, therefore, not separately shown. The slide is made in two halves, as shown in Fig. 7, which are clamped together to provide a housing II in which most of the operating mechanism is disposed. The vertically vreciprociible member I1 is adjustably secured as by clamping screw it to the bar is extending radially from the member which is slidable upon the fixed cylinder 2! which receives the 20 plunges- 22 for supporting platen P. The reciprocable member 2| is connected by link 20a to lever 28 pivoted at 24 to the bracket 25 fastened to the framework of the machine. The other end of lever 22 carries a cam follower 2B which is 25 received by the cam groove 21 of the cam 28 which is secured to shaft 2. Accordingly, as shaft 2 rotates to effect reciprocation of the form block of the wrapping machine, the members I] of the tool slides SS and SSI operate in pre- 30 determined time relation thereto; The end slides E8 and FBI are also each provided with a reciprogable member ll similarly operable from cam Reverting to Fig. 4, the upper end of the member l1 carries a pin extending through the slot 2. in a link Ill pivotally connected to one arm of the bell-crank lever II which is pivoted at 32 to a bracket 33 of the tool slide. The other arm 34 of the bell-crank lever is connected by link 35 to the slidable frame 88 which carries the roll 6 and brush I. As shown in Figs. 3 and 4, the slidable frame 3 is guided for reciprocation toward and from the path of the form block by the guide members I! which receive the rods 38 of the frame I6. The groove of cam 28 is so shaped that the roll 8 and brush I are moved inwardly prior to descent of the form block from the position shown in Fig. 1 to apply a wrapper side panel, as above described, and are retracted as the form block moves upwardly toward the position of Idg. 1. The timing diagram of Fig. 12 illustrates the relation between the movements of the form block and the side tools 6, 1.

The member i1 is provided with a cut-out portion or slot in which a gear 39 is disposed. The pin 4|], secured to the sides of member Il, provides the support for the gear 38. As shown in Fig. 4, on one side of its axis the gear 39 is in mesh with the stationary rack 4| and on the other side of its axis is in mesh with the rack 42 secured to or integral with the slidable member 43. Accordingly, as the member i1 is rec'procated the slidable member 48 is reciprocated to greater extent since the rack and gear arrangement dieto scribed provides a motion-multiplying connection. The cam groove 44 in one face of the reciprocable member 43 engages the cam follower 45 at one end of the bell-crank lever 46 pivotally mounted on a stub shaft secured to one side of the slide. The other arm of the bell-crank lever 44 is connected by link 41 to the slidable member 48 which carries the frame 49 for the presser block II. Preferably, and as shown, the presser block is not rigidly secured to the frame 49 but is 76 mflocktctheposittonahowninl'ig! movedintoengagemulwithaboxto'eflectth'epre mingoperation inl 'ig'Lthe is'guided'forreciprocaflngmovementbytherofill which extend therefrom into frame "II to the poframe II, as more 4. clearly in Fig. 'L'is guided for. movement the rods I! which are received by the guide members II on the main frame of the slide unit. The mechanism for operating the marginal turn-in tools and presser blocks of the end slides ES and ESI is substantially the same as that shown in Fig. 4. The arrangement for operating the end rolls I and Ia, as clearly appears in Fig. l, is generally the same as that for operating the side rolls I, Ia, the principal difference being that the brackets 33 of the end slides are substantially lower since the rolls I and Ia are much closer to the marginal turn-in tools than are rolls I and Ia oi the side slides. Correspond- 35 ing elements of the operating mechanism for the side slides have been identified by the same reference characters with suitable s r p Referrlng to Fig. 4, the side slides carry the comer-lap tools I, Ia for folding the end flaps WE into engagement with the box ends BE. Each of the side slides SS, SSI is provided with a bracket 64 for supporting a shaft 65 to which the pairs of folding tools are secured. The relation between the tools and the form block is clearly shown in the right half of Fig. 3. The arm II secured to shaft 65 is connected to the lever 61, which is pivoted to the frame of the slide, by a yielding connection which permits the lever II to move after the abutment 66a: of arm I6 engages the adjustable stop II on bracket 33. More speciflcally, as shown in Fig. 4, to the lever 81 is pivotally connected the hollow member 59 which receives one end of rod 10 whose other end is pivoted to arm II. A spring II between the collar I2 05 rod 10 and the plug II of member I! biases the parts to the position shown. When lever 61 is moved in counterclockwise direction, the tool I is swung in clockwise direction to meet the box and wrapper assembly; specifically, the tip of so each of the comer-lap tools I meets a corner flap of the wrapper adjacent its lower edge, shortly after the bottom of the box moves below rolls 6, is and moves downwardly with the form block until the lever II is arrested by the stop II. As

65 the form block continues its movement the tools swam 'lI.whooe .versalidn |I,secured 'Arm'll sewredto shaft II-h connected theguidemembersllcarriedbythemainframe;

totheleverllpivotedonthebneket Iland annII mayberivotallymomtedattbeendsofarms moperatingslnttfortheleverfl isconnected'throughauniyenaljoint withtheshaft othes'endisconnectedthroughaunb ttollmftl'lsupportedbythebracket tothemainframeworkof thematerswith suitable subscripts.

Thecam II isadiustablysecuredto the shaft 2 to accommodate the machine for wrapping boxes of diiferent sizes. As shown in Fig.1, an index or'pointer on cam II may cooperate with a scale I'l calibrated for different box sizes. This adjustment is necessary. since whatever may be the folding tools I, In is different for different sizes of boxes.

If desired, the folding tools I, In may be provided with brushes to eflect the wiping action. As shown in'Figs. 5 and 6, the plate II, to which is secured a row of bristles II, is adapted to be I attached to the wiping plate of a folding tool 8. Plate 81 may, as shown, be provided with holes 89 matching holes II in tool I to permit clamping bolts to be passed therethrough.

When the box blanks are unstayed, and particularly for making extension bottom boxes from unstayed blanks, it is desirable that the side walls of the box be supported or held against the form block during the folding of the wrapper, end flaps by the tools I. As shown in Figs. 8 to l0, there may be associated with each of the folding tools 8 a side supporting tool II pivotally mounted upon a block I2 which is adJustably secured to a bar II carried by the tool slide. The under surface of the member II is provided with a cam surface cooperating with an abutment II movable with a tool I. When the tool I is in its retracted position, the side supporting tool II is held by the pin I out of the path of the form block. As the tool I swings inwardly to perform the wiping operation, the side supporting tool 9| also moves inwardly, the pin I4 and the cam surface of the member II controlling the relative positions of the folding tool and the side supporting tool during this movement. When the side supporting tool II reaches the position shown in Fig. 10 in which it is holding the side wall of the box against the form block, the rear extension I! thereof engages the shoulder 96 of the supporting bracket and its further movement is arrested. The wiping tool, however, as shown by Fig. 10, continues to move downwardly with the form block and thus moves pin II out of engagement with the tool II. The side supporting tool moves the side wall of the box into proper position and insures intimate engagement of the wrapper with the box adjacent the corner. As the folding tool I returns to its original position, the pin again engages the supporting member Iia'ndreturns it to the position shown in Fig. 8.

,for operating the wrapping tools makes possible significantchangesinthe timingofvariouselements of the machine. Cam grooves II If ceiving position is completed in substantially less than the complete cycle of the machine, (Fig. 12). Specifically, the form block is returned to the box-receiving position at about295 of the cycle, 15 Fig. 12, having a dwell of about 85 as contrasted with the dwell of only 80 in the machine disclosed in the aforesaid Smith Patent No. 691,329.- The cam groove l2 eiiects continuous movement of the form block from the box-receiving position to the margin turn-in position, there being no dwell for operation of the corner-lap tools. Moreover, the fraction of the cycle for which the formblock is stationary for the margin turn-in operation and the pressing operations is substantially reduced, the dwell provided by cam groove II for these operations being only about 100 as compared with about 140 of the aforesaid Smith machine.

The shape of the cam groove ii is also modified to effect completion of the box-stripping operation by tools SB at about 320", Fig. 12, whereas, in the aforesaid Smith machine the stripping tools were not clear of the box until about 345. With the improved construction, the action of the ejector J is also substantially advanced, af-

fording about of the cycle in which the form block is in box-receiving position and free of obstructions or accessible to receive a box.

With our improved machine, the speed can be 40 substantially increased and yet ailord in each cycle ample time for an operator to-place a box on the form block, whereas, with the construction shown in the Smith patent, it was necessary either to operate the machine at slow speed, or to permit it to stop at the end of each cycle in order to ail'ord sufiicient time for an operator to place a box and wrapper assembly on the form. The substantially increased dwell of the boxblock in box-receiving position is also of advantage when the boxes are fed automatically to the form block.

Furthermore, as appears from Fig. 12, the cam groove I! may be so constructed that the formblock moves relatively slowly when moving downwardly toward the wrapping tools so that even it the form-block has begun to descend, the operator can still place a box on the form-block. The feeding time is thus actually greater than the time aii'orded by the dwell of cam it. Also as shown by Fig. 12, the form-block is moved rapidly upwardly after the box has been completed.

As appears from Fig. 13, the prolonged feeding period may be obtained with a short dwell of the form-block by further reducing the speed at which the form-block is moved downwardly toward the wrapping tools since this increases the time during which the form block is in the clear above the slide units. The figure is self-explanatory and requires no further description particularly in view of the discussion 01 Fig. 12.

In Fig. 11, there is illustrated the application of our new type of "non-stop" corner-lap construction to tool slides for wrapping machines of the type disclosed and claimed in Federwitz applica- 75 tion Serial No. 757,115, filed December 12, 1984,

andgeneraliyofthetypeshcwn inrlltschetal. Patent No. 1,540,000. In this construction, the maincam lcofthewrappingmachineisinthe base and'drives theshaft Il'individual to the slide imits, one of which is shown. Shaft 01, throughsears ll, ll, drives the canal to which cam Ila is adiustably secured. The lever III which corresponds to lever 81, of the modification previously described, is provided with a cam follower III for the camgroovein cam 28a. The principal difference between this modification and that previously described, insofar as the mechanism for operating the comer-lap tools is concerned, is that, in this modification, each of the side slides is provided with a cam for operating the two corner-lap tools of the slide, whereas, in the wrapping machine of Fig. 1, a single cam 00 controls the operation of both sets of corner-lap tools. The corresponding elements have been identified by the same reference characters used in describing the construction and operation of the modification of Figs. 1 to 10.

The modification of Fig. 11 also permits the timing of the machine elements to be changed to aflord a long box-feeding dwell in the cy le of the machine. In general, the timing diagram of of the machine may be substantially the same as that shown in Fig. 12 or Fig. 13.

While we have illustrated and described preferred arrangements, it is to be understood our invention is not limited thereto, but is coextensive in scope with the appended claims in which, for brevity, the term wrapping" is used generically to comprehend the application of wrappers, tabbed, or untabbed, or of staying or tabbing material, and the term "box is used generically to comprehend a stayed, or unstayed, box, a box blank, or one or more components of a multipiece box blank.

What we claim is:

1. A box machine adapted to repeat its cycle continuously at high speed comprising reciprocating form-block structure, comer-lap tools, mechanism for operating said tools while said form-block structure is in motion, and mechanism including cam structure for operating said form-block structure providing, in the cycle of the machine, a period of dwell or slow motion of said form-block structure, of not less than about 40 of said cycle, for application of a box structure thereto.

2. A box machine adapted to repeat its cycle continuously at high speed comprising reciprocating form-block structure, comer-lap tools, mechanism for operating said tools while said form-block structure is in motion, turn-in and pressing tools, mechanism for operating said lastnamed tools while form-block structure is at rest, and mechanism cam structure for operating said form-block structure providing for slow motion thereof during its travel toward said corner-lap tools, for more rapid motion during its travel from said turn-in and pressing tools and a well of said form-block when in box-receiving position of not less than about 40 of the cycle of said machine.

3. A box machine adapted to repeat its cycle continuously at high speed comprising reciprocating form-block structure, corner-lap tools, mechanism for operating said tools while said formblock structure is in motion, turn-in and pressing tool, mechanism for eflecting completion of the operationof said last-named tools in about 100 of a cycle of the machine, and mechanism including cam structure for reciprocating said form-block structure and providing a period for application of a box-structure to the form-block structure which is not less than about 40 of the cycle of said machine. I 4. A box wrapping machine comprising reciprocating form-block structure, corner-lap tools, turn-in tools, mechanism including cam structure for moving said form-block structure from box-receiving position without interruption to a position adjacent said turn-in tools, and for providing a period of dwell or slow motion oi! said form-block structure of not less than about 40 of said cycle for application of box structure, and mechanism for actuating said corner-lap tools to effect their operation during movement of said form-block structure toward said turn-in tools.

5. A box wrapping machine comprising reciprocating form-block structure, corner-lap tools, turn-in and presser tools, mechanism including cam structure for moving said form-block structure from box-receiving position without interruption to a position adjacent said turn-in tools within about 120 01 the cycle of said machine, and for providing a dwell of said form-block struc- 26 ture, for application of box structure, of notless than about 40, and mechanism for actuating said corner-lap tools to effect their comer-lapping operation during movement of said form-block structure toward said turn-in tools.

6. A box wrapping machine comprising reciprocating form-block structure, corner-lap tools, turn-in and presser tools, mechanism including cam structure for reciprocating said form-block structure and constructed to provide a period of 88 slow motion or dwell of said form-block structure, of not less than about 40 of said cycle, for

application of a box structure, continuous movement of said form-block structure from box-receiving position to a position adjacent said turnin tools, and a dwell of said form-block structure of about 100 for operation oi! said presser and turn-in tools, and mechanism for actuating said corner-lap tools to efiect their corner-lapping operation during movement of said form-block structure toward said turn-in and presser tools.

7. A box wrapping machine comprising reciprocating form-block structure, corner-lap tools, turn-in and presser tools, mechanism including cam structure for reciprocating said form-block structure and constructed to provide a dwell of less than about 40 and a period of slow motion of not less than about 40 for application of a box structure, continuous movement of said formblock structure from box-receiving position to a position adjacent said turn-in tools, and a dwell of said form-block structure of materially less than 140 for operation of said presser and turnin tools, and mechanism for actuating said corner-lap tools to efiect their corner-lapping operation during movement of said form-block structure toward said turn-in and presser tools.

8. A box wrapping machine comprising reciprocating form-block structure, corner-lap tools, turn-in and presser tools, mechanism including cam structure for moving said form-block structure from box-receiving position without interruption to a position adjacent said turn-in tools in about 160 of the cycle of said machine, and for providing a dwell of said form-block structure of about 100 for operation of said turn-in. and presser tools, and mechanism for actuating said corner-lap tools to effect their corner-lapping operation during movement of said formblock structure toward said turn-in tools.

ERNEST G. RIDER. WALTER T. BAILEY.

CERTIFICATE OF CORRECTION.

Patent No. 2,074,561.

ERNEST G.

March 23. 1957.

RIDER, ET AL.

It is hereby certified that error appears in the printed specification of the above numbered patent requiring correction as follows:

Page 4,

second column, line 63, claim 2, for the word "well" read dwell; and that the said Letters Patent should be read with this correction therein that the same may conform to the record of the case in the Patent Office.

Signed and sealed this 20th day of July, A. D. 1937.

(Seal) Henry Van Arsdale Acting Commissioner of Patents.

form-block structure and providing a period for application of a box-structure to the form-block structure which is not less than about 40 of the cycle of said machine. I 4. A box wrapping machine comprising reciprocating form-block structure, corner-lap tools, turn-in tools, mechanism including cam structure for moving said form-block structure from box-receiving position without interruption to a position adjacent said turn-in tools, and for providing a period of dwell or slow motion oi! said form-block structure of not less than about 40 of said cycle for application of box structure, and mechanism for actuating said corner-lap tools to effect their operation during movement of said form-block structure toward said turn-in tools.

5. A box wrapping machine comprising reciprocating form-block structure, corner-lap tools, turn-in and presser tools, mechanism including cam structure for moving said form-block structure from box-receiving position without interruption to a position adjacent said turn-in tools within about 120 01 the cycle of said machine, and for providing a dwell of said form-block structure, for application of box structure, of notless than about 40, and mechanism for actuating said corner-lap tools to effect their comer-lapping operation during movement of said form-block structure toward said turn-in tools.

6. A box wrapping machine comprising reciprocating form-block structure, corner-lap tools, turn-in and presser tools, mechanism including cam structure for reciprocating said form-block structure and constructed to provide a period of 88 slow motion or dwell of said form-block structure, of not less than about 40 of said cycle, for

application of a box structure, continuous movement of said form-block structure from box-receiving position to a position adjacent said turnin tools, and a dwell of said form-block structure of about 100 for operation oi! said presser and turn-in tools, and mechanism for actuating said corner-lap tools to efiect their corner-lapping operation during movement of said form-block structure toward said turn-in and presser tools.

7. A box wrapping machine comprising reciprocating form-block structure, corner-lap tools, turn-in and presser tools, mechanism including cam structure for reciprocating said form-block structure and constructed to provide a dwell of less than about 40 and a period of slow motion of not less than about 40 for application of a box structure, continuous movement of said formblock structure from box-receiving position to a position adjacent said turn-in tools, and a dwell of said form-block structure of materially less than 140 for operation of said presser and turnin tools, and mechanism for actuating said corner-lap tools to efiect their corner-lapping operation during movement of said form-block structure toward said turn-in and presser tools.

8. A box wrapping machine comprising reciprocating form-block structure, corner-lap tools, turn-in and presser tools, mechanism including cam structure for moving said form-block structure from box-receiving position without interruption to a position adjacent said turn-in tools in about 160 of the cycle of said machine, and for providing a dwell of said form-block structure of about 100 for operation of said turn-in. and presser tools, and mechanism for actuating said corner-lap tools to effect their corner-lapping operation during movement of said formblock structure toward said turn-in tools.

ERNEST G. RIDER. WALTER T. BAILEY.

CERTIFICATE OF CORRECTION.

Patent No. 2,074,561.

ERNEST G.

March 23. 1957.

RIDER, ET AL.

It is hereby certified that error appears in the printed specification of the above numbered patent requiring correction as follows:

Page 4,

second column, line 63, claim 2, for the word "well" read dwell; and that the said Letters Patent should be read with this correction therein that the same may conform to the record of the case in the Patent Office.

Signed and sealed this 20th day of July, A. D. 1937.

(Seal) Henry Van Arsdale Acting Commissioner of Patents. 

